Editing Head gasket
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− | , and can be detected with certain techniques. Left unfixed, a blown head gasket could cause severe engine damage. Many symptoms of a bad head gasket are not apparent until the problem is very bad, including the ones listed later in this article. | + | {{youcanedit}} |
+ | ==Overview== | ||
+ | The '''cylinder head gasket''' provides the critical seal between the engine block and the cylinder head. They seal the combustion in the combustion chambers and keep coolant contained to the cooling ports in the heads and block. | ||
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+ | Blown head gaskets can be caused by various engine problems, and can be detected with certain techniques. Left unfixed, a blown head gasket could cause severe engine damage. Many symptoms of a bad head gasket are not apparent until the problem is very bad, including the ones listed later in this article. | ||
Various different types of head gaskets exist today, for different applications. Care must be taken in removal of the old gasket, selection of a new gasket and proper installation of the new gasket. | Various different types of head gaskets exist today, for different applications. Care must be taken in removal of the old gasket, selection of a new gasket and proper installation of the new gasket. | ||
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====Graphite head gasket==== | ====Graphite head gasket==== | ||
− | Graphite head gaskets can be used on aluminum heads with an iron block (they work equally well with iron heads on an iron block). Graphite is excellent in handling high temperatures and is anisotropic (draws heat away from hot spots). It also seals very well too. Some drawbacks to using graphite is that it cannot withstand exposure to oil over a long period of time, can be crushed and extruded, and it also leaves a coating on the block and heads that is harder to remove than traditional head gaskets. | + | Graphite head gaskets can be used on aluminum heads with an iron block (they work equally well with iron heads on an iron block). Graphite is excellent in handling high temperatures and is anisotropic (draws heat away from hot spots). It also seals very well too. Some drawbacks to using graphite is that it cannot withstand exposure to oil over a over a long period of time, can be crushed and extruded, and it also leaves a coating on the block and heads that is harder to remove than traditional head gaskets. |
An article that mentions graphite gasket technology is '''[http://www.enginebuildermag.com/Article/2585/gasket_technology_the_science_of_sealing.aspx here]'''. | An article that mentions graphite gasket technology is '''[http://www.enginebuildermag.com/Article/2585/gasket_technology_the_science_of_sealing.aspx here]'''. | ||
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*Retracing the original torque pattern one fastener at a time, slightly loosen the bolt or nut (to overcome the friction set), then re-torque to the specified torque setting | *Retracing the original torque pattern one fastener at a time, slightly loosen the bolt or nut (to overcome the friction set), then re-torque to the specified torque setting | ||
− | {{!}}It is suggested by some to retorque cast iron heads/blocks while still warm (not hot). Whether or not | + | {{!}}It is suggested by some to retorque cast iron heads/blocks while still warm (not hot). Whether or not this is done when using iron castings (research this beforehand) is up to the builder. But this should NOT be done with aluminum blocks or heads. |
===When replacing a blown head gasket=== | ===When replacing a blown head gasket=== | ||
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==References== | ==References== | ||
===Compression calculators=== | ===Compression calculators=== | ||
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*[http://www.wheelspin.net/calc/calc2.html Static compression ratio] | *[http://www.wheelspin.net/calc/calc2.html Static compression ratio] | ||
− | + | *[http://www.empirenet.com/pkelley2/DynamicCR.html Dynamic compression calculator] by Kelly | |
− | + | *[http://www.kb-silvolite.com/calc.php?action=comp2 Dynamic compression calculator] by KB | |
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− | *[http://www.empirenet.com/pkelley2/DynamicCR.html | + | |
− | *[http://www. | + | |
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===Forum discussions=== | ===Forum discussions=== | ||
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[[Category:Engine]] | [[Category:Engine]] | ||
[[Category:Good articles]] | [[Category:Good articles]] | ||
+ | {{Develop1}} | ||
[[Category:Cylinder head]] | [[Category:Cylinder head]] |